
div,p,span,ul,ol,li{
    margin: 0;
    padding: 0;
}
li{
    list-style: none;
}
.roll-box{
    margin: 5px 0;
    white-space: nowrap;
    font-size: 0;
}

.roll-box .roll-item{
    box-sizing: border-box;
    display: inline-block;
    font-size: 16px;
}